Need some advice - New Yukon AT4 Ultimate check engine light came on

[Donnation]

I just purchased a new 2025 Yukon AT4 Ultimate a couple of days ago. Today out of the blue when I started the vehicle the "check engine" symbol appeared in the dash. Needless to say I was not pleased and a little worried. The vehicle is running fine. I wasn't home so I drove it to my next stop. When I got back out to the vehicle the light didn't come on and didn't come on for the rest of the day. I was going to drive it to the dealership first thing in the morning but its literally 2 hours away from me. I can do it, its just an inconvenience but was wondering if anyone had any advice on how I should handle this with the dealer or if I should even bother going if the light doesn't come back on in the morning.

Any advice would be very much appreciated.

 

[Fless]

First thing to do is get a scanner on it and read the code. It's probably a "stored" code so the scanner will need to be able to read those. If you don't have a scanner check the auto parts store and use theirs to read it.

 

[WalleyeMikeIII]

If it’s new, and your OnStar is active, press the button and have them run a remote diagnostic. It will give you the codes.